Lubricating system



March 9 1926.

E. w. DAVIS LUBRICATING SYSTEM Filed Jan. 14, 1924 3 Sheets-Sheet 1 If/ra March 9 1926. 1,575,976

E. W. DAVIS LUBRICATING SYSTEM Filed Jan. 14. 1924. :5 Sheets-Sheet 2March 9 1926.

E. W. DAVIS LUBRICATING SYSTEM 5 Sheets-Slieec s Filed Jan. 14, 1924v. 1. 4: NE?

Patented Mar. 9, 1926.

UNITED S ATES I 1,575,976 PATENT OFFICE 11mm w. DAVIS, OAK PARK,ILLINOIS, ABSIGNOBTO THE aroma OOIPLIY, OF CHICAGO, ILLINOIS, AOOBPORLTION 0F nmwm 'LUBBICATIZHG SYSTEM.

lpglloatoln'flod January 14 1984; Serial Io, 688,061.

-fittings, one of which is adapted to be secured to each of the bearingsto be lubricated, and a compressor for supplying lubricant underpressure to said fittings comrising means for placing the lubricant unorpressure, and means for efiecting a sealed connection with the fittings.

The objects of my present invention are: First, to provide a lubricatingsystem of the character described, comprising a compressor soconstructed that the operations of connecting the compressor in sealedrelation with a fitting and of developing pressure upon the lubricant inthe compressor can be accomplished by one hand;

Second, to provide a compressor of the character described, in which thefitting coacts with the compressor to develop pressure upon thelubricant supplied to the fitting;

Third, to provide a compressor such as described, in which the re$ure isdeveloped by movement of a portion of the compressor, the other part ofthe com ressor' being secured to or held immovab e by the fitting;Fourth, to providev a compressor of the character described, whichcannot become air-bound Fifth, to provide a compressor for handlineither fluid or plastic lubricants; and

Sixth, to provide a compressor which is simple in construction,economical to manufacture, and by means of which the lubricant caneasily be placed under hi h pressure.

Other objects of my invention will appear as this descriptionprogresses, reference being had to the accompanyingdrawings, in which-Figure 1 is a central longitudinal section through a compressor,embodying my invention;

Figure 2 is a central longitudinal section on an enlarged scale, showingcertain details of construction-of the compressor;

Figure 3 is a transverse section taken on line 3--3 of Figure 1; v

Figure 4 is a view similar to Figure 2, but showmg a modified form of myinvention; Figure 5 is a side elevation of the construction shown inFigure 4;

Figure 6 is a central longitudinal section through another embodiment ofmy invention;

Figure 7 is a transverse section line 7--7 of Figure 6;

Figure 8 isa view partially in side elevataken on tion and partially inlongitudinal section,

showing another modificatlon of my invention; and

'Fi through still another vention.

Throughout the several views similar reference characters will be usedfor referring to similar parts.

The embodiment of my invention illusmodification of my intrated inFigures 1, 2, and 3 comprises a barrel 10 having a removable cap 11which is provided with an air vent 12 and a sprin pressed valve 13 forclosing same. The en of the barrel 10 opposite the cap 11 is tapered asshown at 10 to provide a discharge conduit. A flanged partition let,positioned adjacent the large end of the tapered portion of the barreland provided with a 1nrality of spaced rts 15 which are close by theleather disc ap valve 16 secured thereto by means of the rivet 17,divides the compressor barrel into. a storage reservoir 18 and a primingchamber 19.

A sleeve 20 is threaded onto the outer .end of the dischar e conduit 10'and a centrally apertured bre disc 21 is clamped between the shoulder 22on the sleeve 20 and the end of the discharge conduit 10' of thecompressor. A curved valve 23 is adapted to close the port 21in thefibre disc 21, and is provided with a stem 24 which projects through theport 21' and terminates in a head 25', between which and the fibre disc21 is confined a compression spring 25 which yieldingly holds the valve23 in its closed position." The bore of the sleeve 21 is contractedadjacent its outer end to form a shoulder 26 which acts as a seat forthe centrally apertured cup leather 27. A centrally apertured metal cupre 9 is a central longitudinal section I 28 seated within'the cu leather27 provides means for preventing t e flange or slde wall of the cupleather 27 from becoming deformed under the immense pressure to which itis subjected, and also acts as an abut-- yieldingly holding theprojections 29 in contact w1th the bottom of the. cup 28, and also forholding the cup leather 27 in its outermost osition. The em odiment ofmy invention described above is intended to be used for fillinglubricant receiving fittings of the type shown at 32, which is providedwith a pair of rojections 33 extending from o posite' si es thereof, andwith a screw tfiieaded portion 34 adapted to screw into the bearing tobe lubricated. Fittings of this type are in general use uponautomobiles, tractors, trucks, industrial machinery,

etc., and a detailed description thereof is for that reason unnecessar pThe outer end of the sleeve 20 is provided with a pair of oppositelydisposed inclined slots 35, which are adapted to receive the projections33. -These slots extend inwardly from the outer end of the sleeve 20 to.a the bottom of t ecup leather 27 and are so proportioned that when thepins 33 have fairly entered these slots, the end of the fitting 32 willcontact with the bottom of the cup leather 27. I From this description,it will be apparent that when the barrel 10 of the compressor is rotatedin the pro er direction, the sleeve 20 will be threa ed onto the pins33, thereby causing the end of the fitting 32 to push the cup leatherand its associated parts inwardly, and that a if the space between the.cup leather and the fibre gasket 21 has previously been filled withlubricant, this lubricant will be placed under pressure and thus forcedinto the fitting 3 In using my im roved compressor described above, itis rst filled with oil while held in an upright position and the weightof this oil will be sufiicient to open the flap valve 16, so that notonly the reservoir portion of the barrel butalso the priming chamber 19will be filled. The spring 25 has very littletension, so that the weightof the oil when the barrel 18 is held in an upright osition issufiicient to open the valve 23 and permit the chamber between the cupleather 27 and the disc 21 to be filled. The opening 36 in the bottom ofthe cup 28 is ma e quite smallso that atmos eric pressure is sufiicientto retain the oil 1n the oint immediately adjacent this chamber becomesfilled, the valve 23 will close and the operator can thereu on attachthe sleeve 20 to a fitting as descri (1 above, and by rotating thebarrel 10 relatively to the fitting can cause the latter to moveinwardly in the sleeve 20, thereby placing the contents of this sleeveunder ggmpression. and forcing it into the fitting. It will, of course,be seen that before any inward ,movement of the cup leather 27 takesace, it will be held in sealing contact with the end of the fittingunder the pressure of the spring 31, and that as it moves inwardl thepressure tending to hold it against 't e end of the fitting willincrease as the ressure upon the lubricant increases. In t is manner thegasket or cup leather 27 is forced not only to ekert pressure upon thelubricant which is to be supplie to the fitting, but also to effectaseal between the compressor and the fitting so that the lubricant underhigh pressure can be supplied thereto without loss.

It frequently happens that in filling compressors such as describedabove, a certain amount of air will become tra ped in the 4 lubricant,and ultimately this an will reach the cylinder formed by the sleeve 20.Furthermore, as the lubricant is used from the barrel 10, air will enterthe barrelthrough the port 12 and will ultimately find its way past theflap valve 16 and into the sleeve 20. Unless some means is provided forinsurm the 'ection of air from the sleeve e or cylinder'fiormed thereby,it will merely be compressed and then expand in the cylinder as the culeather moves inwardly and outwardly during the operation of thecompressor, and no lubricant will be delivered to the fitting. Toavoidthis action, I have provided the cup 30, the bottom of which 1s spacedvery slightly from the bottom of the cup 28, the width of this spacebeing in the neighborhood of one thirty-second of an inch so that thelubricant must pass through this comparatively narrow space. Usually thefittings are located u on a mechanism in such manner that t e compressormust be held in a horizontal lane. This means that if there'isany air inthe sleeve 20, it will occupy the upper portion of the sleeve. When thecompressor is actuated to place the lubricant under pressure, the airwill of course be placed under the same pressure, and as soon as'itbegins discharging through the fitting the superior expansible force ofthe air will assert itself and force its way through the opening in thebottom of the cup 28 and in the gasket in preference to the lubricant.

This discharge of air will also be facilitated by the fact that theviscosity of air is less than of oil, and that it can therefore morereadily ass through theopeningsin the cup leat er and the cup 28. Byoscillating the barrel several times, theoperator can to be operated,but that this operation be-- comes necesary at infr uent intervals.

One of the reasons or providing the priming chamber 19' is to prevent asmuch as possible the entry of air into the sleeve on cylinder 20. Byholding. the compressor in an upright pesition after the filling of eachfitting, the chamber 19 can be maintained entirely filled with oil andwill remain filled with oil even though the compressor be then" laced ina horizontal osition or with the sleeve 20 uppermost. this manner it ispossible to exclude air from the cylinder 20. I

The embodiment of my invent'on shown in Fi es 4 and 5 is similar to thatdescribe above, except that the discharge conduit 10' in lace of beingrigidly secured to the leeve 20, is reciprocably mounted in the innerend of this sleeve, and is secured thereto by means of a pin 37 whichoperates in two oppositely disposed cam slots 38. Otherwise, theconstruction of this modified form of my invention is similar to thatdescribed above, exce t that a cup leather 39 is used for sealing t ejoint between the sleeve 20 and the end of the discharge conduit 10. Thesleeve 20 is provided at its outer end with the inclined or cam slots35, which in this case have a somewhat smaller pitch than the slots 38.With this construction, when the outer end of the sleeve 20 is broughtinto co-actin relation with the fittin and the barrel 0 the corn ressoris' rotated, the projeotions 33 on the fitting will first move into theslots 35, because these slots having a smaller pitch than the slots 38will oLfier less resistance to the movements of the projections 33 thanthe slots 38 will offer to the movements ofthe ends of the pins 37 Inthis manner the gasket 27 is forced inwardly, thereby discharging aportion of the lubricant from the sleeve 20, and when this movement hasbeen completed, further rotation of the barrel 10. causes the outer endof the discharge conduit 10 to be forced into the sleeve by the actionof the slots 38 and the ends of the pin 37, thereby expelling a furtherquantity of lubricant from the cylinder 20. Upon turning the barrel inthe opposite direction the parts will assume their former osition, and anew supply of lubricant wi 1 be drawn into the sleeve 20.

The embodiment of my invention shown the compressor is in Figures 6and 7is similar to that described above, except here the barrel is formed oftwo parts 10 and Y10", the first of which is merely a tin containerintended to be sold to the consumer filled with oil.

The cover can'be removed from this container so that the portion 10 canbe secured thereto by t e Screw threaded connection 10. In thisembodiment of my invention the partition 14- is located in the portion10 of the barrel and rovided with a central aperture 15 closed y theflap valve 16'. The sleeve 20' is also shown as being inte-f gralliformed with the discharge conduit 10'. K

A ard fibre sleeve 40 is screwed-into the inner end of the dischargeconduit 10 and has an end portion 21 corresponding to the fibre disc 21of the embodiment shown 'n Figures 1 and 2, and a flexible tube 41 hasone end secured in the inner end of the 35 sleeve 40 and its other endloaded by means of an iron or lead sleeve 42, so that the inner end ofthis tube is free to seekthe lowest portion of the 'priifiiilrg chamber19 when horizontal position and thus insure a suppl of lubricant freefrom air to the sleeve 20 A supply of air to the barrel 10 for replacingthe oil removed from the barrel I in a substantially can be insured bycutting a small groove 43 transversely of the threads in the portion 10of the barrel. While this groove will insure a supply of air to theinterior of the reservoir 10, it will not be large enough to permit anappreciable escape of lubricant therefrom.

In Figure 8 I have illustrated a modified form of my invention which isadapted to supply grease or other plastic or semi- Elastic lubricants tothe fittings. This emodiment differs from that shown in Figure 6 in thatit omits the partition 14 and substitutes therefor a follower 43 whichis slidably mounted in the barrel 10 and guided by means of the rod 44,the o ter end of which is secured to the 'end of the barrel 10. A port12' permits access of air to the barrel 10 as the lubricant is withdrawn therefrom. In the operation ofthis gun, the first few movements oroscillations thereof causes the air to be withdrawn from the sleeve 20,thereby forming a vacuum therein, and atmospheric pressure exerted uponthe outer face of the follower 43 causes it to move inwardly and forcelubricant intothe sleeve 20', from which it is discharged uponsubsequent oscillation of the compressor. y

The embodimentof my. invention shown in Figure 9 is similar to thatshownin Figure 6, except that it is designed to permit the sale of oilin glass bottles forming the cylinder 10", the neck 10 of this bottlebeingtprovided with threads44 to be received rotatably mounted upon thesleeve An annular rib 47 extends outwardly from the sleeve 20 and isenga ed by the flange 48 on the sleeve 46. By t ese means the sleeve 20"can be secured to the neck of the bottle 10'. I prefer to employ agasket 49 for sealing the joint between the neck of the bottle and thesleeve 20".

In place of the partition 14 of F i ure 6, I prefer to form the primingcham er 19 by means-of the nipple 50 which is secured to the inner endof the sleeve 20, and which contains an inlet port 15 closed by the ball16", which is yieldingly held in its closed position by means of thespring 52. This embodiment of my invention operates in substantially thesame manner as those disclosed in the remaining figures, and for thatreason a detailed description of this mode of o eration is unnecessary.

While I ave described the details of construction of the preferredembodiments of my invention, it is to be clearly understood that myinvention is not limited to these details, but is capable of otheradaptations and modifications within the scope of the appended claims.

Having thus described my invention, what I claim is 1. The combinationwith a fittin having a projection extendin' from one side thereof, ofmeans for supp ying lubricant to said fitting, comprising a barrelhaving a discharge opemng at one end, a partition extending across saidbarrel adjacent said discharge opening, said partitlon forming a primingchamber adjacent said discharge opening and a reservoir" remotetherefrom, said partition having a valved opening permitting the passageof lubricant from said reservoir to said priming chamber, a sleevesecured to said barrel and communicating with said discharge opening, anoutwardly opening sprin pressed valve controlling the passage ofubricant from said discharge opening into said sleeve, a centrally apertured cup leather slidably mounted in said sleeve, and a spring foryieldingl' urging said cup leather in an outward irection the outer endof said sleeve being provided with an inclined cam slot for receivingthe projection on said fitting, the'inner end of said cam slotterminating adjacent the bottom of said on leather.

7 2. The combination with a fitting having a projection extending fromone side thereof, of means for suppl ing lubricant to said fitting,comprisinga arrel divided into a "reservoir and a rlming chamber, asleeve secured to said arrel and communicating with said dischargeopening, an outwardly ressed valve controlling t e passage of lu ricantfrom said primin chamber into said sleeve, a asket slidably mounted insaid sleeve, an a spring for yieldingly urgin said gasket in an outwarddirection, t e outer end ofsaid sleeve being provided with an inclinedcam slot for receiving the projection on said fitting..

3. The combination with a fitti having a projection extending from onesi e thereof, of means for supplying lubricant to .said fitting,comprising a reservoir, a priming chamber communicating with saidreservoir, a sleeve communicating with said priming chamber, anoutwardly opening spring pressed valve controlling the peesage oflubricant from said riming chamber into said sleeve, a er orated gasketslidably mounted -in sai sleeve, and a spring for yieldingly urging saidasket in an outward direction, the outer en of said sleeve beingprovided with an inclined cam slot for receiving the projection on saidfitting, said cam slot bein located adjacent the outer side of saidasiet, whereby oscillation of said sleeve re atively to said fittingWlll cause reciprocation of said gasket.

4. A lubricant compressor comprising a lubricant reservoir, a primingchamber having a valved connection with said reservoir, a cylindercommunicatin with said priming chamber, an outwa y openingspring pressedvalve controlling communication be tween said priming chamber and saidcylinder, a gasket slidably mounted in the outer end of said cylinderanda cam on said cylinder for coacting with means for reciprocating saidgasket.

5. A lubricant compressor comprising a lubricant reservoir, a primingchamber having a valved connection with said reservoir, a cylindercommunicating with said priming ,chamber, a asket slidably mounted inthe outerend 0 said cylinder, and a cam on said cylinder for co-actingwith means for reciprocating said gasket.

6. A lubricant compressor having a cylinder, one end of which is formedby a gasket which is adapted to make sealed contact with a fitting, andmeans for insuring the discharge of air from the rear of sand gasketwhen the lubricant in said cylinder is placed under pressure, ing a cup,the bottom of which is slightly spaced from said gasket and the flangeof which extends to the inner wall of said cvlinder.

In witness whereof, hereunto subscribe my name this 10th day of January,1924.

. ERNEST W. DAVIS.

o ening spring comprispoints in close proxim1ty to

